Experimenting based on https://www.youtube.com/watch?v=nDURoh5KgqY&lc=UgxH3ZKk71bUdA_UTPB4AaABAg.9D8iTLeZq6o9DB_f1eUfLK
The fact that you can actually make a costume that's larger than the costume editor was pointed out by CODE WITH ADITYA on YouTube. Please subscribe to his channel at https://www.youtube.com/channel/UCz2Cs3f8QhjsHKR7qXfBAYA -- there are some cool Scratch tutorials there.
